扬帆起航
8. 21 - 4. 7 =
4. 97 + 7. 29 =
2. 23 + 5. 5 =
1. 03 + 4. 02 =
7. 41 - 2. 14 =
8. 64 - 7. 85 =
3. 66 + 5. 9 =
4. 36 + 7. 5 =
8. 28 + 7. 36 =
7. 42 + 9. 92 =
8. 76 + 0. 75 =
4. 06 + 4. 85 =

8.21 - 4.7 = 3.51
4.97 + 7.29 = 12.26
2.23 + 5.5 = 7.73
1.03 + 4.02 = 5.05
7.41 - 2.14 = 5.27
8.64 - 7.85 = 0.79
3.66 + 5.9 = 9.56
4.36 + 7.5 = 11.86
8.28 + 7.36 = 15.64
7.42 + 9.92 = 17.34
8.76 + 0.75 = 9.51
4.06 + 4.85 = 8.91

乘风破浪
2. 98 + 3. 26 =
4. 22 - 2. 66 =
7. 68 - 6. 5 =
5. 62 + 2. 82 =
6. 67 - 2. 72 =
2. 91 + 5. 54 =
5. 29 + 6. 33 =
9. 32 + 3. 4 =
9. 81 - 0. 09 =
6. 63 + 7. 16 =
5. 2 - 1. 5 =
7. 96 + 2. 29 =
7. 82 - 7. 2 =
4. 4 + 15. 99 =
1. 9 + 5. 79 =
73. 4 + 5. 1 =
3. 45 + 5. 75 =
1 - 0. 55 =
4. 8 + 3. 2 =
8. 5 + 2. 5 =
1. 34 + 0. 8 =
20 + 0. 78 =
0. 51 + 0. 19 =
14. 6 - 0. 4 =
3. 5 - 3 =
2 + 9. 1 =
10 - 0. 8 =
5. 64 - 1. 78 =
0. 8 + 0. 18 =
12 - 4. 4 =

2.98 + 3.26 = 6.24
4.22 - 2.66 = 1.56
7.68 - 6.5 = 1.18
5.62 + 2.82 = 8.44
6.67 - 2.72 = 3.95
2.91 + 5.54 = 8.45
5.29 + 6.33 = 11.62
9.32 + 3.4 = 12.72
9.81 - 0.09 = 9.72
6.63 + 7.16 = 13.79
5.2 - 1.5 = 3.7
7.96 + 2.29 = 10.25
7.82 - 7.2 = 0.62
4.4 + 15.99 = 20.39
1.9 + 5.79 = 7.69
73.4 + 5.1 = 78.5
3.45 + 5.75 = 9.2
1 - 0.55 = 0.45
4.8 + 3.2 = 8
8.5 + 2.5 = 11
1.34 + 0.8 = 2.14
20 + 0.78 = 20.78
0.51 + 0.19 = 0.7
14.6 - 0.4 = 14.2
3.5 - 3 = 0.5
2 + 9.1 = 11.1
10 - 0.8 = 9.2
5.64 - 1.78 = 3.86
0.8 + 0.18 = 0.98
12 - 4.4 = 7.6

圆满返航
男子 400 米栏共设置了 10 个栏，起点到第一个栏的距离是 45 米，最后一个栏离终点 40 米，则相邻两栏之间的距离是()米。
秘籍点拨 这 10 个栏之间有几个栏间距？
第 65 片

400-45-40=315(米)
10-1=9(个)
315÷9=35(米)
答：相邻两栏之间的距离是35米。